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EP0916675
European procedure
Extract from the Register of European Patents
EP About this file: EP0916675
| EP0916675 - Process for preparing sildenafil [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 04.06.2004 Database last updated on 11.04.2026 | Most recent event Tooltip | 04.06.2004 | No opposition filed within time limit | published on 21.07.2004 [2004/30] | Applicant(s) | For:GB
Pfizer Limited Ramsgate Road Sandwich, Kent CT13 9NJ / GB | For:AT
BE
CH
DE
DK
ES
FI
FR
GR
IE
IT
LI
LU
NL
PT
SE
Pfizer Research and Development Company, N.V./S.A. La Touche House, International Financial Services Centre Dublin 1 / IE | [N/P] |
| Former [2003/31] | For:GB
Pfizer Limited Ramsgate Road Sandwich, Kent CT13 9NJ / GB | ||
| For:AT
BE
CH
DE
DK
ES
FI
FR
GR
IE
IT
LI
LU
NL
PT
SE
Pfizer Research and Development Company, N.V./S.A. La Touche House, International Financial Services Centre Dublin 1 / IE | |||
| Former [1999/20] | For:GB
Pfizer Limited Ramsgate Road Sandwich Kent CT13 9NJ / GB | ||
| For:AT
BE
CH
DE
DK
ES
FI
FR
GR
IE
IT
LI
LU
NL
PT
SE
Pfizer Research and Development Company, N.V./S.A. La Touche House, International Financial Services Centre Dublin 1 / IE | Inventor(s) | 01 /
Dunn, Peter James Pfizer Central Research Ramsgate Road Sandwich, Kent CT13 9NJ / GB | 02 /
Wood, Albert Shaw Pfizer Central Research Ramsgate Road Sandwich, Kent CT13 9NJ / GB | [1999/20] | Representative(s) | Ruddock, Keith Stephen Pfizer ATTENTION: ADDRESS INACTIVE - USE ASS-NR - CDR / FR | [N/P] |
| Former [1999/20] | Ruddock, Keith Stephen Pfizer Limited, European Patent Department, Ramsgate Road Sandwich, Kent CT13 9NJ / GB | Application number, filing date | 98123740.7 | 04.06.1997 | [1999/20] | Priority number, date | GB19960012514 | 14.06.1996 Original published format: GB 9612514 | [1999/20] | Filing language | EN | Procedural language | EN | Publication | Type: | A2 Application without search report | No.: | EP0916675 | Date: | 19.05.1999 | Language: | EN | [1999/20] | Type: | A3 Search report | No.: | EP0916675 | Date: | 14.07.1999 | [1999/28] | Type: | B1 Patent specification | No.: | EP0916675 | Date: | 30.07.2003 | Language: | EN | [2003/31] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 31.05.1999 | Classification | IPC: | C07D487/04, A61K31/505 | [1999/20] | CPC data not yet available | Designated contracting states | AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LI, LU, NL, PT, SE [1999/20] | Extension states | LV | 14.12.1998 | RO | 14.12.1998 | SI | 14.12.1998 | Title | German: | Verfahren zur Herstellung von Sildenafil | [1999/20] | English: | Process for preparing sildenafil | [1999/20] | French: | Procédé pour la préparation de sildenafil | [1999/20] | Examination procedure | 14.12.1998 | Examination requested [1999/20] | 22.11.2001 | Despatch of a communication from the examining division (Time limit: M06) | 30.05.2002 | Reply to a communication from the examining division | 12.09.2002 | Despatch of a communication from the examining division (Time limit: M04) | 23.12.2002 | Reply to a communication from the examining division | 12.02.2003 | Communication of intention to grant the patent | 22.05.2003 | Fee for grant paid | 22.05.2003 | Fee for publishing/printing paid | Parent application(s) Tooltip | EP97303832.6 / EP0812845 | Opposition(s) | 04.05.2004 | No opposition filed within time limit [2004/30] | Fees paid | Renewal fee | 21.08.1999 | Renewal fee patent year 03 | 10.03.2000 | Renewal fee patent year 04 | 04.04.2001 | Renewal fee patent year 05 | 09.08.2002 | Renewal fee patent year 06 | 11.04.2003 | Renewal fee patent year 07 | Penalty fee | Additional fee for renewal fee | 30.06.1999 | 03 M06 Fee paid on 21.08.1999 | 30.06.2002 | 06 M06 Fee paid on 09.08.2002 |
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| Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court. | Documents cited: | Search | [DY] EP0463756 (PFIZER LTD et al.) [DY] 1 * page 4 - page 6 * | [A] EP0526004 (PFIZER LTD et al.) [A] 1 * page 3, line 36 * | [DA] WO9428902 (PFIZER LTD et al.) [DA] 1 * claim 1 * | [Y] HAMILTON ET AL: "Synthesis and Structure-Activity Relationships of Pyrazolo[4,3-d "pyrimidin-7-ones as Adenosine Receptor Antagonists", J.MED.CHEM, vol. 30, no. 1, 1987, pages 91 - 96, XP002040681 [Y] 1 * Conversion of "6" to "5".; page 92 * DOI: http://dx.doi.org/10.1021/jm00384a016 |